Upgrade to 4.3.1 help

You need to copy the spark file in the new framework to your project.

You don't need to run `composer update` when you upgrade the framework,
because the framework does not exists in your vendor directory.

> how can i update the vendor libraries?

When you want to update vendor libraries, run `composer update`.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper